diff --git a/Assets/VRM10/Runtime/Components/Constraint/VRM10PositionConstraint.cs b/Assets/VRM10/Runtime/Components/Constraint/VRM10PositionConstraint.cs
index abeec4b9f..12d9f82ba 100644
--- a/Assets/VRM10/Runtime/Components/Constraint/VRM10PositionConstraint.cs
+++ b/Assets/VRM10/Runtime/Components/Constraint/VRM10PositionConstraint.cs
@@ -41,7 +41,7 @@ namespace UniVRM10
                     break;
 
                 case ObjectSpace.model:
-                    m_dst.ApplyModel(DestinationCoords * new TR(DestinationOffset) * new TR(Delta));
+                    m_dst.ApplyModel(DestinationInitialCoords * new TR(DestinationOffset) * new TR(Delta));
                     break;
 
                 default:
diff --git a/Assets/VRM10/Runtime/Components/Constraint/VRM10RotationConstraint.cs b/Assets/VRM10/Runtime/Components/Constraint/VRM10RotationConstraint.cs
index b78481eb1..31b1c509b 100644
--- a/Assets/VRM10/Runtime/Components/Constraint/VRM10RotationConstraint.cs
+++ b/Assets/VRM10/Runtime/Components/Constraint/VRM10RotationConstraint.cs
@@ -41,7 +41,7 @@ namespace UniVRM10
                     break;
 
                 case ObjectSpace.model:
-                    m_dst.ApplyModel(DestinationCoords * new TR(DestinationOffset) * new TR(Quaternion.Euler(Delta)));
+                    m_dst.ApplyModel(DestinationInitialCoords * new TR(DestinationOffset) * new TR(Quaternion.Euler(Delta)));
                     break;
 
                 default:
diff --git a/Assets/VRM10/Runtime/Components/Constraint/VRM10RotationPositionConstraintBase.cs b/Assets/VRM10/Runtime/Components/Constraint/VRM10RotationPositionConstraintBase.cs
index 552d45d91..d3875e93a 100644
--- a/Assets/VRM10/Runtime/Components/Constraint/VRM10RotationPositionConstraintBase.cs
+++ b/Assets/VRM10/Runtime/Components/Constraint/VRM10RotationPositionConstraintBase.cs
@@ -85,7 +85,7 @@ namespace UniVRM10
             }
         }
 
-        TR SourceCoords
+        TR SourceInitialCoords
         {
             get
             {
@@ -115,12 +115,12 @@ namespace UniVRM10
                         {
                             throw new ConstraintException(ConstraintException.ExceptionTypes.NoModelWithModelSpace);
                         }
-                        return new TR(SourceModelCoords.Rotation * SourceOffset, SourceCoords.Translation);
+                        return new TR(SourceModelCoords.Rotation * SourceOffset, SourceInitialCoords.Translation);
                     }
 
                 case ObjectSpace.local:
                     {
-                        return new TR(SourceCoords.Rotation * SourceOffset, SourceCoords.Translation);
+                        return new TR(SourceInitialCoords.Rotation * SourceOffset, SourceInitialCoords.Translation);
                     }
 
                 default:
@@ -147,7 +147,7 @@ namespace UniVRM10
             }
         }
 
-        public TR DestinationCoords
+        public TR DestinationInitialCoords
         {
             get
             {
@@ -172,12 +172,12 @@ namespace UniVRM10
                         {
                             throw new ConstraintException(ConstraintException.ExceptionTypes.NoModelWithModelSpace);
                         }
-                        return new TR(DestinationModelCoords.Rotation * DestinationOffset, DestinationCoords.Translation);
+                        return new TR(DestinationModelCoords.Rotation * DestinationOffset, DestinationInitialCoords.Translation);
                     }
 
                 case ObjectSpace.local:
                     {
-                        return new TR(DestinationCoords.Rotation * DestinationOffset, DestinationCoords.Translation);
+                        return new TR(DestinationInitialCoords.Rotation * DestinationOffset, DestinationInitialCoords.Translation);
                     }
 
                 default: